Polishing machine



' DERBERG POLISHING MACHINE Filed July 5. 1925 2 Sheefcs-Shut 1 M,filwzurba; I gi aaw Aug. 4, 1925. 1,548,105

I J SQDERBERG N 7' POLISHING MACHINE A Filed July 5, 1923 2 Sheets-Sheet2 INVENTOR Patented Aug. 4, 1925.

v UNITED STATES 1,548,195 PATENT OFFICE.

JACOB. SODER-BERG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOE TO PITTSBURGHPLATE GLASS COMPANY, A CORPORATION OF PENNSYLVANIA.

POLISHING MACETNE.

Application filed July 5,

To all whom it may concem:

Be ,it known that I, ,JAoon Sonnnnnne, a

in Polishing Machines,-of which the following is a specification.

The invention relates to polishing machines for use in polishing plateglass and particularly-to the runner construction. It has for itsprincipal objects; the provision of an improved mounting for the runnerwhereby it may move freely up and down with a minimum amount of wear inthe moving parts and with no tendency of the parts to bend and hold theface of the runner at an angle to the plane of the glass as is the casewith the ordinary runner spindle which slides through the runner frame;the provision of a construction which permits the ready lifting andtilting of the runner to .bring its face in position for cleaningwithout detachin the runner from the runner frame; and t e rovision of aconstruction rmits o the utilization of the centrifugal force, incidentto the rotation of the runner frame, to regulatethe pressure which; therunner applies to the table. Certain embodiments of the invention areillustrated in the accompanying drawings wherein:

Figure 1 is a side elevation partially in section showing the assembledapparatus.

36- Fig. 2 is a detail side-elevation view on an enlarged scale showingthe mountmg of one of the runners. Fig. 3 is a plan view of theconstruction shown in Fig. 2. And Figs. 4

' and 5 are views of a modification similar to those of Figs. 1 and 2.

Referring to the general arrangement of Fig. 1, the reference numeral 1indicates the usual revolving polishing table to the upper surface ofwhich is secured the glass 2 which is to be polished. Mounted insuitable bearings 3 and 4. on the cross beam 5 constituting a portion ofthe framework of the machine is the runner spindle 6. The runner spindleis adjustedand held at the desired vertical position by means of thelever 7 fulcrumed at 8 upon the bracket 9 carried by the frame member10, and is provided at its inner end with a fork 11 which fits aroundthe thrust bearing member 12. The member 12 engages a second thrustbearing member 13 which is 1923. Serial in. 049,723.

pinned to the upper end of the spindle 6.

To the outer end of the lever 7 is secured the threaded adjusting rod 14which extends through the pivoted bracket member 15 carried upon'thelower side of the beam 10 and through the threaded hub portion of thehand wheel 16, thus providing means whereby the runner spindle and partscarried thereby may be raised and lowered.

Mounted upon the lower tapered'end of the spindle is the runner frame 17which is in the form of a disc carrying at its periphery the pluralityof runners 18. These runners are in the form of metal blocks to thelower sides of which are secured the felts 19. The upper sides of theblocks are socketed to receive the ball heads 20 of the spindles 21,such ball heads being held in their sockets b means of the plates 22held by the stud bo ts 23. This permits the runner blocks to adjustthemselves'so. that they present their lower surfaces in parallelrelationwith the glass and also permits the blocks-to rotate withrespect to the spindles. The spindles are connected to the runner frame17 by means of the pairs of links 24 and 25 pivoted to the frame by thepins 26 and 27 and to the spindles by the pins 28 as indicated in F ig.3. v

The foregoing arrangement permits the runners to move freely up and downand at the same time maintains the spindles in vertical positionregardless of the position of the runners. This involves an improve mentover the common method heretofore employed in which the spindles wereslidably mounted in vertical perforations in the runner frame and inwhich the centrifugal force applied to the runners and incident to therotation of the runner frame tended to impose a binding strain upon thespindles and thus restrict their freedom of movement up and down. Underthese conditions with the .the present construction, this difliculty isentirely overcome and the spindles are as free to move vertically afterlong service as when first installed. The constructlon also and 29, theends of the links being forked a in the end of the means might beemployed permits of an adjustment or regulation as to the amount ofpressure which the runners impose on the glass so that their polishingeffect may be increased or decreased as conditions require. Thisadjustment is secured by raising and lowering the runner frame 17. Whenthe runner frame is lowered from the position illustrated, thecentrifugal force incident to the rotation of the runner causes therunners to press downwardly so that the polishin efi'ect .noident totheir weight is increase On the other hand, if it. is desired todecrease the polishing effect of the runners, this may be accomplishedby raisi g the runner frame from theposition s iown, so that thecentrifugal force tends to lift the runners from the glass, thusdecreasing their pressure thereon. This regulation is secured withoutany tilting of so that the pressure exercised throughout the areas ofthe runners is uniform and is not concentrated at one side or the other.

In order to limit the up and down'movement of the spindles, the surfacesare provided on the runner frame in position to engage the surfaces ofthe links after the spindles have moved up or down a certain distance.

When it is desired to expose the lower surface of a runner block inorder to clean the felt or in order to replace the felt by a new one.the spindle may "be tilted to the dotted line position indicated in Fig.1 by removing the pin 26 at the inner end of the link 24 and swingingthe parts upward, after which the spindle may be secured in its inclinedpos1- tion. inserting a bolt through the lug 31 on the frame and throughthe perforations link 24. Various other for holding the tile in thisinclined position, but the one tratcd is preferred. because of its sim-L flhis feature which permits of the a the s indle to inclined position,rly vantageous when. the run 111 connection with a straightaway olishingles carrying the glass to be polished are moved beneath a series ofpolishing runners. Under these conditions and with the polishingoperation a. continuous one rather than. an intermittent one, it becomesdesirable to clean the olishers one by one without interrupting thecontinuous operation, and without the application of water to the tableto clean the felts, and without the removal of the tables from beneaththe runners to give access to the felts. The present arrangement permitsof the removal of the rallied rouge from the felts without interas a panmay be.

faring with the operation, inserted beneath the runner after it is tlted to inclined position and the felt scraped and washed withoutinterfering with the o era tion of the other polishing machines and therunners operation in which a series of tawithout applying water to thetable, itself, such as would diminish the efficiency of the polishingaction of the other machines of the series. The regulation of thepressure between the runners and the table may also be varied betweenggeater limits in the straightaway operation in which the spindle ispositively driven than is the case in the standard operation such asillustrated in which the table is rotated and the rotation of the runnerframe is caused by the contact between the runners and the rotatingtable. It will, therefore, be 'understood that the inventioncontemplates the application of the link mounting of the runner spindleseither to an arrangement in which the runner frame is positively rotatedor in which it merely acts as an idler.

Figs. 4 and 5 illustrate a modification-in which the runner frame isdriven sitively by a motor, the operation invo ving, the straightawayone heretofore referred to in which the glass is carried beneath aseries of polishing runners by means of tables ounted upon a. track.This modification also shows a different method of mounting the runnerspindle. In this construction, 32 is the framework; 33 is the runnerframe; 34 is one of the series of tables carrying the glass moved ahead.by the gear 35 engaging racks 36 on the bottoms of the tables; 37 is abearing member carrying the drive spindle 38; 39 is a motor for drivingthe spindle 38 through the intermediary of reducing gearing in thecasing 40; 41 is a lever for supporting the weight of the polishing unitengaging trunnions 42 projecting from the gear casing; 43 is a linkpivoted to the frame and engaging other trunnions 44 carried by themember 37; and 45 is a, rod pivoted to the end of the lever 41 andcorresponding in function 1, said rod being adjustable vertically bymeans of the hand wheel 46 to adjust the vertical position of the runnerframe.

The runners 47 are connected to the spindles 48 by ball joints 49similar to those of Fig. 2, but the method of mounting the spindle isdifferent. In this construction, the spindle is mounted to rotate in apair of bearings 50 and 51, collars 52 which are pinned to the spindle.The links 53 and54 which are forked at their ends as in the otherconstruction are pivoted at their outer ends to the bearings 50 and 51by means of the stud bolts 55 which links 53 and 54 are pivoted to theframe 33 by the bolts 56 as in the other form of construction. Thisarrangement relieves the ball connection 49 of a considerable portion ofthe wear to which it is subject in the other form of construction, sincethe spindle is free to turn in the bearings 50 and 51. The ioint at theball connection to the rod 14 of Fig.

held between pairs of quired.

therefore, does not wear loose as rapidly and fewer amusements andreplacements are re What l'cleixn is: I I 1. In combination in a machinefor polisliing glass, a runner frame, a plurality oipolishing runnershaving vertical spindles, and parallel link motion connections lietweentheframe and spindles for maintaining the spindles in vertical positionduring their up and down movements with respect to the frame.

2. In combination in a macliinefor polishing glass, a runner frame, aplurality of polishing runners having vertical spindles, pairs ofarallel links each connected. at one end to t e frame and at the otherto the spindle and arranged one above the other, and means whereby theconnections between the lower links and the frame maybe releasedtopermit the spindles to be swung outwardly to inclined position toexpose the lower surfaces of the runners for cleaning or repair.

3. In combination m a machine for polishing glass, a runner frame, aplurality of snares polishing runners having vertical spindles, pairs ofparallel links each connected at one end to the frame and at'the otherto the spindle and arranged one above the other, means whereby theconnections between the lower links and the frame at their inner endsmay be released to permit the spindles to be swung outwardl to inclinedtical position during their up and down movements with respect to theframe.

In testimony whereof, I have hereunto subscribed my name this 30th day,of June, 1923.

JACQB SODERBERG

